Data sets have tales to tell. In the Caselaw Access Project API, full-text search is a way to find these stories in 300+ years of U.S caselaw, from individual cases to larger themes.

This August, John Bowers began exploring this idea in the blog post Telling Stories with CAP Data: The Prolific Mr. Cartwright, writing: “In the hands of an interested researcher with questions to ask, a few gigabytes of digitized caselaw can speak volumes to the progress of American legal history and its millions of little stories.". Here, I wanted to use the CAP API full-text search as a path to find some of these stories using one keyword: pumpkins.

The CAP API full-text search option was one way to look at the presence of pumpkins in the history of U.S. caselaw. Viewing the CAP API Case List, I filtered cases using the Full-Text Search field to encompass only items that included the term “pumpkins”:

api.case.law/v1/cases/?search=pumpkins

This query returned 640 cases, the oldest decision dating to 1812 and the most recent in 2017. Next, I wanted to take a closer look at these cases in detail. To view the full case text, I logged in, revisited that same query for “pumpkins”, filtering the search to display full case text.

By running a full-text search, we can begin to pull out themes in Caselaw Access Project data. Of the 640 cases returned by our search that included the word “pumpkins”, the jurisdictions that produced the most published cases including this word were Louisiana (30) followed by Georgia (22) and Illinois (21).

In browsing the full cases returned by our query, some stories stand out. One such case is Guyer v. School Board of Alachua County, decided outside Gainesville, Florida, in 1994. Centered around the question of whether Halloween decorations including "the depiction of witches, cauldrons, and brooms" in public schools were based on secular or religious practice and promotion of the occult, this case concluded with the opinion:

“Witches, cauldrons, and brooms in the context of a school Halloween celebration appear to be nothing more than a mere “shadow”, if that, in the realm of establishment cause jurisprudence."

In searching the cases available through the Caselaw Access Project API, each query can tell a story. Try your own full-text query and share it with us at @caselawaccess.

This September we hosted a Legal Tech Gumbo session dedicated to using quantitative methods to find new threads in U.S. caselaw. The Legal Tech Gumbo is a collaboration between the Harvard Law & Technology Society and Harvard Library Innovation Lab (LIL).

The session kicked off by introducing data made available as part of the Caselaw Access Project API, a channel to navigate 6.4 million cases dating back 360 years. How can we use that data to advance legal scholarship? In this session Research Associate John Bowers shared how researchers can apply quantitative research methods to qualitative data sources, a theme which has shaped the past decade of research practices in the humanities.

This summer, Bowers shared a blog post outlining some of the themes he found in Caselaw Access Project data, focusing on the influence of judges active in the Illinois court system. Here, we had the chance to learn more about research based on this dataset and its supporting methodology. We applied these same practices to a new segment of data, viewing a century of Arkansas caselaw in ten-year intervals using data analytics and visualization to find themes in U.S. legal history. Want to explore the data we looked at in this session? Take a look at this interactive repository (or, if you prefer, check out this read-only version).

Recently we announced the launch of the Caselaw Access Project at case.law. But we want to highlight the story of the case.law domain itself.

That domain was generously provided by Carl Jaeckel, its previous owner. Carl agreed to transfer the domain to us in recognition and support of the vital public interest in providing free, open access to caselaw. We’re thrilled to have such a perfect home for the project.

Carl is the managing partner of Jaeckel Law, the Founder of ClassAction.org, and the Chief Operating Officer of Dot Law Inc. We can’t wait to see what he and other legal entrepreneurs, researchers, and developers will build based on case.law.

Today the Library Innovation Lab at the Harvard Law School Library is excited to announce the launch of its Caselaw Access Project (CAP) API and bulk data service, which puts the full corpus of published U.S. case law online for anyone to access for free.

Between 2013 and 2018, the Library digitized over 40 million pages of U.S. court decisions, transforming them into a dataset covering almost 6.5 million individual cases. The CAP API and bulk data service puts this important dataset within easy reach of researchers, members of the legal community and the general public.

To learn more about the project, the data and how to use the API and bulk data service, please visit case.law.

The Caselaw Access Project is a project of the Library Innovation Lab at the Harvard Law School Library, and the digitization effort was completed through the partnership and support of Ravel Law, Inc..

Practically speaking, of course, all it takes for a body of material to become usable ‘data’ is a person or organization willing to make that material accessible to analysis. The HLS Library Innovation Lab’s Caselaw Access Project represents an effort to do just that for centuries of American caselaw. Through resources generated and maintained by the Caselaw Access Project, researchers can explore the rich legal history of the United States byte by byte.

If the rise of big data has taught us one thing, however, it is that “can” does not necessarily imply “should.” Indeed, the practice of subjecting core texts from the humanities and social sciences to data-driven analysis has been met with sharp resistance from some quarters. A widely discussed essay by Daniel Allington, Sarah Brouillette, and David Golumbia criticizing the “Digital Humanities” movement recently argued that the application of quantitative methods to such material has driven “the displacement of… humanities scholarship and activism in favor of the manufacture of digital tools and archives.” To the essay’s writers and others of similar mind, the expansion of data’s domain comes as a threat to the integrity of a long tradition of scholarship.

In this post, I present my experience working with the Caselaw Access Project’s publically available Illinois dataset as evidence for a more optimistic narrative – namely that applying quantitative techniques to corpuses primarily associated with the qualitative disciplines can help us to uncover and relate stories which might otherwise go unnoticed.

I uncovered this particular story while messing around with measures of “prolificness” amongst Illinois judges between 1850 and the present. I had generated a plot tracking the number of opinions judges had published per year over the timespan (each point corresponds to one judge’s output over the course of one year):

I noticed an interesting trend – in a window of time between about 1890 and 1930, many justices were publishing upwards of 50 opinions per year (it’s worth noting that modern publication numbers have likely been pushed down by the rise of unpublished opinions, which are not indexed in reporters and therefore cannot be cited as precedent). Digging down a little further, I plotted yearly publication volume for the 5 Illinois judges who wrote the most opinions over the course of their careers.

All of these judges fall more or less into the timespan discussed, and all were justices of the Illinois Supreme Court. Running the numbers, it became apparent that one Mr. Justice Cartwright was firmly in the lead as the most prolific publisher of legal opinions in the history of the state of Illinois.

My efforts to investigate Cartwright’s life and times through internet research were largely unfruitful. Among the most complete sources I found was a short profile on a website dedicated to social reformer Florence Kelley, which cites just two brief articles about Cartwright – both of them published in the 1920s. A brief Wikipedia entry provides a portrait of the justice taken in 1919, about five years before his death.

From these paltry sources, I learned that Cartwright was born in Iowa Territory on December 1st, 1842. After serving with some distinction in the Civil War, he attended Michigan Law School starting in 1865. Between 1868 and 1876, he served as general attorney for a regional railroad company. After a period of private practice, Cartwright was elected as a circuit court judge in Oregon, Illinois in 1888. In 1895, he became a justice of the Illinois Supreme Court – a position which he held until his death on May 18th, 1924.

However, none of the sources I was able to locate shed much light on Cartwright’s amazing prolificness, though some of the articles written around the time of his death do reference it offhand. For further insights, I turned to the data. After cleaning and standardizing data corresponding to Cartwright and his peers on the Illinois Supreme Court across his almost 30-year career, I visualized the yearly output of of each justice present in the dataset.

With a few exceptions, Cartwright was among the most prolific publishers on the court throughout his time as a justice. He was particularly active in his early years of service, with a marked drop off in the two years immediately preceding his death. However, it is clear from the visualization above that Cartwright wasn’t writing enormously more than his peers – there is often at least one justice who authors more than him in a given year, and he occasionally winds up in the middle of the pack. Where, then, does his dominance come from? To find out, I generated a cumulative plot of the number of opinions written by each justice in the span between 1895 and 1925.

As we can see, it is not just Cartwright’s yearly rate of production that catapulted him to dominance – it is also his consistency. In the years between 1896 and 1922, just once did Cartwright have an annual output of fewer than 50 opinions. Over the course of a lengthy career, he kept up this breakneck pace with a degree of longevity and persistence that seems to have eluded his peers.

Perhaps a bit of this relative immunity to fatigue can be attributed to the style of Cartwright’s writing. Per the visualization below, Cartwright tended to writer shorter opinions than the majority of his peers – his average opinion totalled about 1,724 words, as compared to the court-wide average of 1,949 words. Justice Orrin Carter, the second most prolific justice on the court in the period examined, averaged about 2,209 words per opinion. Carter’s 1,129 opinions summatively contain 2,493,649 words, whereas Cartwright’s 1,978 opinions contain 3,411,869. Interestingly, Cartwright’s word counts were at their lowest during the beginning and end of his career.

This basic investigation demonstrates just a few of the insights that this dataset offers into the professional life of Cartwright and his peers. In the hands of an interested researcher with questions to ask, a few gigabytes of digitized caselaw can speak volumes to the progress of American legal history and its millions of little stories.

The data used in this blog post can be downloaded on the Caselaw Access Project Website: https://capapi.org/bulk-access/. An iPython Notebook containing all of the analysis and visualization code used in this post can be found on Github here: https://github.com/john-bowers/capexamples/blob/master/CAPDemo.ipynb. Please note that this dataset contains OCR errors and was not cleaned completely – figures are approximate.

Evelin Heidel (@scannopolis on Twitter) recently asked me to document our Caselaw Access Project (website, video) digitization workflow, and open up the source for the CAP "Tracking Tool." I'll dig into our digitization workflow in my next post, but in this post, I'll discuss the Tracking Tool or TT for short. I created the TT to track CAP's physical and digital objects and their associated metadata. More specifically, it:

Tracked the physical book from receipt, to scanning, to temporary storage, to permanent storage

Served as a repository for book metadata, some of which was retrieved automatically through internal APIs, but most of which was keyed in by hand

Tracked the digital objects from scanning to QA, to upload, to receipt from our XML vendor

Facilitated sending automated delivery requests to the Harvard Depository, which stored most of our reporters

Provided reports on the progress of the project and the fitness of the data we were receiving from our XML vendor

If I might toot my own horn, I'd say it drastically improved the efficiency and accuracy of the project, so it's no wonder Evelin is not the first person to request I open up the source. If doing so were a trivial undertaking I certainly wouldn't hesitate, but it's not. While we have a policy of making all new projects public by default in LIL, that was not the case in the position I held when I created the tracking tool. And while there's nothing particularly sensitive in the code, I'm not comfortable releasing it without a thorough review. I also don't believe that after all that work the code would be particularly useful to people. There's so much technical debt, and it's so tightly coupled with our process, data, vendors, and institutional resources that I'm sure adapting it to a new project would take significantly more effort than starting over. I'm confident that development of Capstone — the tool which manages and distributes the fruits of this project — is a much better use of my time.

Please allow me to expound.

The Tracking Tool - The Not So Great Parts

During the project's conception in 2013, I conceived of the TT as a small utility to track metadata and log the receipt, scanning, and shipping of casebooks. Turning a small utility into a monolithic data management environment by continually applying ad hoc enhancements under significant time constraint is the perfect recipe for technical debt, and that's precisely what we ended up with.

The only flexibility I designed into the application, such as being able to configure the steps each volume would proceed through during the digitization process, was to mitigate not knowing exactly what the workflow would look like when I started coding, not because I was trying to make a general-purpose tool. It was made, from the ground-up, to work with our project-specific idiosyncrasies. For example, code peppered throughout the application handles a volume's reporter series, which is a critical part of this workflow but nonexistent in most projects. Significant bits of functionality are based on access to internal Harvard APIs, or having data formatted in the CaseXML, VolumeXML, and ALTO formats.

If all of that wasn't enough, it's written in everybody's favorite language, PHP5, using Laravel 4, which was released in 2013, and isn't the most straightforward framework to upgrade. I maintain that this was a good design choice at the time, but it indeed isn't something I'd recommend adopting today.

Now that I've dedicated a pretty substantial chunk of this post to how the TT is a huge, flaming pile of garbage, let's jump right over to the "pro" column before I get fired.

The Tracking Tool - The Better Parts

Despite all of its hacky bits, the TT is functional, stable, and does its jobs well.

Barcodes

Each book is identified in the TT by its barcode, so users can quickly bring up a book's metadata/event log screen with the wave of a barcode scanner. Harvard's cataloging system assigned most of the barcodes, but techs could generate new CAP-only barcodes for the occasional exception, such as when we received a book from another institution. Regardless of the barcode's source, all books need to have an entry in the TT's database. Techs could create those entries individually if necessary, but most often would create them in bulk. If the book has a cataloging system barcode, it pulls some metadata, such as the volume number and publication year, from the cataloging API.

Reporters

A crucial part of the metadata and organization of this tool is the reporter table — a hand-compiled list of every reporter series' in the scope of this project. Several expert law librarians constructed the table by combing through a few hundred years of Harvard cataloging data, which after many generations of library management and cataloging systems, had varying levels of accuracy. If you're interested, check out our master reporter list on github! The application guesses each volume's reporter based on its HOLLIS number — another internal cataloging identifier — but needs to be double-checked by the tech.

Automated Expertise

There are several data points created during the in-hand metadata analysis stage which would trigger outside review. If a book was automatically determined to be rare using a set of criteria determined by our Special Collections department, or the tech flagged it as needing bibliographic review, the TT included the barcode in its daily email to their respective groups of specialists.

Process Steps and Book Logs

The system has a configurable set of process steps each volume must complete, such as in-hand metadata analysis or scanning, with configurable prerequisites. Such a system ensures all books proceed through all of the steps, in the intended order, and facilitates very granular progress reports. Each step is recorded in the book's log, which also contains:

Info Entries: e.g., user x changed the publication year for this book

Warnings: e.g., the scan job was put on hold

Exceptions: e.g., the scanned book failed the QA test.

Control Flow

Each of those process steps has a configurable set of prerequisites. For example, to mark a book as "analyzed," it must have several metadata elements recorded. To mark it as "stored on X shelf," the log must contain a "scanned" event.

If a supervisor needs to track down a book during the digitization process, they can put that book "on hold." The next person to scan that barcode sees a prominent warning and must engage with a confirmation prompt before taking any action. Generally, the person who placed the volume on hold would put instructions in the volume's notes field.

Efficiency

Accessing each volume page to record an event, such as receipt of a book from the repository, is terribly inefficient with more than a few books. In the streamlined mode, techs specify a process step which they can bulk-apply to any book by scanning its barcode. An audio cue indicates whether or not the status was applied correctly, so the technician doesn't even have to look a the computer unless there's a problem.

External Communication

The TT has a simple REST API to communicate with daemons that run on other systems. Through the API, external processes can trigger uploading metadata once the file upload is complete, monitor our scanner output, discover newly uploaded objects from our vendor, sync scan timestamp and QA status, and a few other things.

Quality Assurance

Within the TT lies a system to inspect the output received from our XML vendor. The user can view statistics about the number volumes received per state or jurisdiction, drill down to see XML tag statistics at different levels of granularity, or even drill down to individual cases where you can view page images overlaid with interactive ALTO text. The higher-level overviews were quite useful in ironing out some vendor process problems.

The Long and Short of It

The tracking tool was an invaluable part of the CAP workflow, but vast swaths of the code would only be useful to people replicating this exact project, using Harvard's internal cataloging systems, using the highly automated scanner we used configured precisely like ours, and receiving XML in the exact format we designed for this project. While a subset of the TT's features would be pretty useful to most people doing book digitization, I am very confident that anybody interested in using it would be much better off creating a more straightforward, more generalizable tool from scratch, using a better language. I've considered starting a more generalizable, open source tool for digitization projects, but if someone else gets to it first, I'd be happy to discuss the architectural wisdom I've gained by writing the TT. If someone knows of another open source project already doing this, let me know; I'd love to check it out. Reach out to lil@law.harvard.edu with any questions, comments, or hate mail!

A roomful of people sitting in armchairs with laptops may not appear
at first glance to be a place where library work is happening. It
could look more like a tech startup, or maybe a student lounge (modulo
the ages of some of the people in the armchairs). You don't have to be
a librarian to see it, but, as the only librarian presently working at
LIL, I'll try to show how LIL's work is at the heart of librarianship.

Of our main projects, the
Nuremberg project
is the closest to a notion of traditional library work: scanning,
optical character recognition, and metadata creation for trial
documents and transcripts from the Nuremberg Military Tribunals, a
collection of enormous historical interest. This is squarely in the
realm of library collections, preservation, and access.

In its broad outline, the work on Nuremberg is similar to that of the
Caselaw Access Project,
the digitization of all U.S. case law. This project, however, is what
Jonathan Zittrain has referred to as a systemic intervention. By
making the law freely accessible online, we are not only going to
alter the form of and access to the print collection, but we are going
to transform the relationships of libraries, lawyers, courts,
scholars, and citizens to the law. By freeing the law for a multitude
of uses, the Caselaw Access Project will support efforts like
H2O, LIL's free
casebook platform, another intervention into the field of publishing.

Over the last forty years or so, as computers have become more and
more essential to library work, libraries have ceded control to
vendors. For example, not only does a library subscribing to an online
journal database lose the ability to make collection development
decisions autonomously (though LOCKSS, a
distributed preservation system, helps address this), but, in
relinquishing control of the platform, it relinquishes the power to
protect patron confidentiality, and consequently intellectual freedom.

Perma.cc is an
intervention of a different sort, a tool to combat
link rot. As a means of
permanently archiving web links, it's close to libraries' preservation
efforts, but the point of action is generally the author or editor of
a document, not an archivist, post-publication. Further, Perma's
reliability rests on the authority of the library to maintain
collections in perpetuity.

As library work, these interventions are radical, in the sense of
at-the-root: they address core activities of the library, they engage
long-standing problems in librarianship, and they expand on and
distribute traditional library work.

Hannah Brinkmann - Hannah is a comic artist and student at the University of Applied Sciences in Hamburg, Germany. She'll be connecting with our Nuremberg Trials Project and our Library's foreign collections to develop a graphic novel about "conscience trials" in Germany.

Tim Walsh - Tim is a digital archivist and programmer. He'll be working on tools to help librarians and archivists manage sensitive personal information in digital archives.

Carrie Bly - Carrie is an architect studying at the Harvard Graduate School of Design. She'll be exploring connections and contrasts between library and garden classification systems.

Shira Feldman - Shira is an artist and writer. This summer she will be exploring the intersection of internet and art, and what it means to live in a networked, digital culture.

Kendra Greene - Kendra is a writer and researcher from Dallas. She'll be working on a book about dangerous library collections.

Evelin Heidel - Evelin (aka scann) is a teacher and open knowledge advocate from Argentina with deep experience in DIY digitization. She'll be developing learning resources to help small libraries, community archives, underrepresented groups and others build their own digital collections.

Franny Corry - Franny is a digital history researcher studying at the USC Annenberg School for Communication and Journalism. She'll be working this summer on combining personal narrative with web archives to collect social histories of the web.

We invited these eight explorers to join us after reviewing over 120 applications and conducting roughly 60 interviews, including multiple interviews with all of the finalists. This year's applicant pool amazed and challenged us, and we are so grateful to everyone who applied and who helped spread the word about the opportunity. Thank you!

The Creative Commons Conference in Toronto was wonderful this past weekend! It was a pleasure to meet the mix of artists, educators, civil servants, policymakers, journalists, and copyright agents (and more) who were there.

Talks touched on everything from how the Toronto Public Library manages their digital collections and engages their local cultural and tech communities with collections, to feminist theory and open access, to the state of copyright/open access worldwide.

The range of stakeholders and interested parties involved with open access was greater than I realized. While I'm familiar with libraries and academics being interested in OA and OER, the number of government policymakers and artists who were there to learn and discuss was heartening.

Until next year, Creative Commons! And thank you, Ontario!
-Brett and Casey